From link:

"I have found that there are a couple reasons that one might like to plant a ground covering that is edible. The first is that you have a small yard or garden plot and want to increase the amount of produce that you grow.

The second, and my reason, is that you are allergic to common grasses and wish to grow something beautiful that you are not allergic to. What ever your reason, we are going to discuss what plants you may use for a ground covering that are both edible and beautiful."

http://www.offthegridnews.com/2011/0...ground-covers/

I get e-mails from Off The Grid every day - great info!